RFR (L): 8058354: SPECjvm2008-Derby -2.7% performance regression on Solaris-X64 starting with 9-b29

Thomas Schatzl thomas.schatzl at oracle.com
Tue Feb 17 08:35:09 UTC 2015


Hi all,

On Tue, 2015-02-03 at 10:32 -0800, Jon Masamitsu wrote:
> On 02/03/2015 02:27 AM, Thomas Schatzl wrote:
> > Hi Jon,
> >
> >    thanks for the comments. I incorporated all of them in the latest
> > webrev at
> >
> > http://cr.openjdk.java.net/~tschatzl/8058354/webrev.1/ (full)
> > http://cr.openjdk.java.net/~tschatzl/8058354/webrev.0_to_1/ (diff)

That webrev contains a bug that I found shortly after, the roundto()
method just rounds but does not divide :/ Please re-review the fix for
that.

After fixing this I went through another big round of testing (perf +
lots of aurora tests) to make sure that the change is finally good.

Here are the changesets:

http://cr.openjdk.java.net/~tschatzl/8058354/webrev.2/ (full)
http://cr.openjdk.java.net/~tschatzl/8058354/webrev.1_to_2/ (diff)

Sorry for the issues,
  Thomas




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